I would do it like this, as the h90 has two stereo effect units, with a relatively flexible routing:
A4 -> H90
AR -> H90
H90 -> Zoom H5
H5 -> Headphones
This will give you the internal effects of the elektron machines, H90 effects separat for each machine or combined (check the routing possibilities), a stereo recording plus monitoring of the master recording via headphones. You also can use balanced cables for all connections till the signal reaches the recorder.
Seems like a very small, but very capable setup. Optionally, you could introduce a master compression unit (maybe an OTO Boum or a Elektron Heat) between the H90 and the H5.
Cheers and a happy new year 
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